1.1 这些试验方法包括锻造和铸造铝和镁合金产品的拉伸试验，铝箔除外， 2. 和来源于测试方法 电子8 ，涵盖了所有金属材料的张力测试。 1.2 以英寸磅为单位的数值应视为标准。本标准不包括其他计量单位。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 注1: 箔是小于0.0079的金属片 英寸厚。在0.006至0.0079的厚度范围内存在重叠 英寸，定义用于箔和片材。 该厚度范围内的片材产品按片材产品规范供应，该厚度范围的箔产品按箔产品规范供应。这些测试方法的规定可能需要在特定材料的个别规范或测试方法中做出例外规定。 注2: 测试方法的完整度量标准 B557型 已经制定了测试方法 5.57亿南非兰特 ; 因此，在这些测试方法中没有给出度量等价物。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 4.1 拉伸试验提供了材料在单轴拉伸应力下的强度和延展性信息。这些信息可能有助于在某些情况下对材料、合金开发、质量控制和设计进行比较。 4.2 从零件或材料的选定部分加工成标准尺寸的试样的拉伸试验结果可能并不完全代表整个最终产品的强度和延展性财产或其在不同环境中的使用性能。 4.3 这些测试方法被认为是商业货物验收测试的合格方法，并已在贸易中广泛用于此目的。

1.1 These test methods cover the tension testing of wrought and cast aluminum- and magnesium-alloy products, with the exception of aluminum foil, 2 and are derived from Test Methods E8 , which cover the tension testing of all metallic materials. 1.2 The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: Foil is sheet metal less than 0.0079 in. thick. There is an overlap in the thickness range 0.006 to 0.0079 in. defined for foil and sheet. Sheet products in this thickness range are supplied to sheet product specifications and foil products in this thickness range are supplied to foil product specifications. Exceptions to the provisions of these test methods may need to be made in individual specifications or test methods for a particular material. Note 2: A complete metric companion to Test Methods B557 has been developed—Test Methods B557M ; therefore, no metric equivalents are presented in these test methods. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 Tension tests provide information on the strength and ductility of materials under uniaxial tensile stresses. This information may be useful in comparisons of materials, alloy development, quality control, and design under certain circumstances. 4.2 The results of tension tests of specimens machined to standardized dimensions from selected portions of a part or material may not totally represent the strength and ductility properties of the entire end product or its in-service behavior in different environments. 4.3 These test methods are considered satisfactory for acceptance testing of commercial shipments and have been used extensively in the trade for this purpose.